D20: Benign neoplasm of soft tissue of retroperitoneum and peritoneum excludes1 benign lipomatous neoplasm of peritoneum and retroperitoneum (D17.79) benign neoplasm of mesothelial tissue (D19.-) |
| D20.0: Benign neoplasm of soft tissue of retroperitoneum |
| D20.1: Benign neoplasm of soft tissue of peritoneum |